Home Postcodes by state SA 5650 Postcode 5650 5650 is the postcode for 3 localities in SA: Cootra, Koongawa and Warramboo. Localities with postcode 5650CootraSAKoongawaSAWarrambooSA Postcode 5650 State or territory South Australia (SA) Localities 3 Council area Kimba; Mainly Wudinna, partly Kimba; Wudinna Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5642 · Postcode 5651